#    Supsta
#    Copyright (c) 2014 Sebastian Dufner
#
#    This file is part of Supsta.
#
#    Supsta is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    Supsta is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

require 'supsta/project/target_provider'
require 'supsta/project/texture'

module Supsta

  ##
  # A target, typically representing a single texture sheet.

  class Target < TargetProvider
    attr_accessor :filename, :size

    def initialize(filename, size)
      @filename, @size = filename, size
    end

    ##
    # Add a dependency.

    def <<(dep)
      fail TypeError, "#{dep.class} is no Texture" unless dep.is_a? Texture

      dependencies << dep
      self
    end

    ##
    # Returns the Array of dependencies.

    def dependencies
      @dependencies ||= []
    end

    ##
    #

    def compile(app, options = {})
      # TODO: preparations
      textures.values.each {|t| t.compile(layer, options.merge(size: size))}
    end

    ##
    # Returns a new Hash representing this Target.

    def to_hash
      super.merge!(filename: filename, size: size)
    end

  end
end
